Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2436
Number of amino acids:31
Molecular Weight:3299.87 Da
Theoretical pI:4.53


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)26.45%
Cysteine CYS (C)619.35%
Glutamic Acid GLU (E)26.45%
Aspartic Acid ASP (D)00%
Glycine GLY (G)26.45%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)26.45%
Histidine HIS (H)00%
Lysine LYS (K)13.23%
Methionine MET (M)00%
Leucine LEU (L)13.23%
Asparagine ASN (N)13.23%
Glutamine GLN (Q)00%
Proline PRO (P)26.45%
Serine SER (S)39.68%
Arginine ARG (R)00%
Threonine THR (T)26.45%
Tryptophan TRP (W)13.23%
Valine VAL (V)412.9%
Tyrosine TYR (Y)26.45%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC142
HydrogenH220
NitrogenN34
OxygenO44
SulphurS6

FormulaC142H220N34O44S6
Total Number of Atoms:446


Total number of positively charged residues (ARG + LYS):1
Total number of negatively charged residues (ASP + GLU):2
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    8855
Absorption 0.1% (=1 g/l)    2.683,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    2.570,   assuming all CYS residues are reduced
Aromaticity:0.097

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.52

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.26, 25.81, 16.13]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:81.6128
Grand average of hydropathicity (GRAVY):0.73